中学学科网组卷网 教评网 学易书城
e卷通介绍 使用手册 收藏本站 有奖挑错建议
高中语文综合库
eqIdc13953f2514e4c8f9c8aaaf5241c33ac是第二象限的角”是“eqIdc13953f2514e4c8f9c8aaaf5241c33ac是钝角”的(   )条件.
A.充分不必要B.必要不充分C.充要D.既不充分也不必要
更新:2019/8/9难度系数:0.85题型:单选题组卷:311次
已知抛物线eqId93cbffaa5ae045d6ac45d1e979991c3a:eqIda88cfa18b37e40ddb6144e4f1956c418的焦点为eqIdd5b10b2a13f148b78e0d5a1b820538fd,准线为eqId417e80f1349244878d01fe90e0891f5feqId417e80f1349244878d01fe90e0891f5feqId072d7d6b911b42bc89207e72515ebf5f轴的交点为eqIdd7be5abad1e34f6db17a56660de8d54f,点eqId2381423d4cd146cab95f55527681a766在抛物线eqId93cbffaa5ae045d6ac45d1e979991c3a上,过点eqId2381423d4cd146cab95f55527681a766eqIdf117744886d24075a66f2f46cbe69c84于点eqId517584fed25c413ba8b7bb33ffa2d5c6,如图1.已知eqId38a1e20b995f4143bcb4a19a4ba94d58,且四边形eqIdb7f362414d244fc58d550ed93f0c6b9c的面积为eqId757fa3a8e0bc4df9bd2f30045051a231.
figurefigure
(1)求抛物线eqId93cbffaa5ae045d6ac45d1e979991c3a的方程;
(2)若正方形eqId5ce7a06ae7a34393b92b5277978ac014的三个顶点eqIdcc614bd3390c4d028df189b234dcc351eqId8754ce8cf7f34f04abb9a0c041f57f5ceqId19a4eb16029e4550a14f2afe4741a3c3都在抛物线eqId93cbffaa5ae045d6ac45d1e979991c3a上(如图2),求正方形eqId5ce7a06ae7a34393b92b5277978ac014面积的最小值.
更新:2019/10/21难度系数:0.15题型:解答题组卷:154次
已知函数eqIdba38ab38894140e0af0bb5025ebe765c,其中eqIde9edd995034840cfb557ea415074294a.
(1)求eqId4837c94ef0ff4dcf9b1dda4df363275a的单调递增区间;
(2)当eqId4837c94ef0ff4dcf9b1dda4df363275a的图像刚好与eqId8e15963708e9415da25069fea5906e24轴相切时,设函数eqIdd2725eca93ec4821b93430cd517c454a,其中eqIdc399c7e3751449b6a3b85c065162bf4d,求证:eqId28c4c21271884dfeac29ce0222782376存在极小值且该极小值小于eqId30c998d35a344d80a18e14a8c8f2d14f.
更新:2019/10/21难度系数:0.4题型:解答题组卷:70次
如图,直三棱柱eqId9881c5faa5cb449bb37fa59b41c76e43中,eqIdb139c1fed7c44076817a8330c676ffa8eqIdc0ccc58b8e954a0a83b879635b3538b8eqId348bf2c3045d49f797736d5858af3ce8eqId0cd8063abf2b458f80091bc51b75a904eqIdfe9cbfb067114ce8857e621d77cb5feb的中点,点eqId93cbffaa5ae045d6ac45d1e979991c3a为线段eqId1ed5c9a541554ff2bbacbddf4d0638c6上的一点.
figure
(1)若eqId31d7b03448c94fd8b0439ad2907b8029,求证:eqId2abebaccbdd24efca4f9ded9284b8954
(2)若eqIde1b92a673f314e61b81c58dd917bc30e,异面直线eqId1ed5c9a541554ff2bbacbddf4d0638c6eqId34c6b6e427744abfb88dc90b8c7c2111所成的角为eqId4023ceb292e24a45871ca56fa44d50e3,求直线eqId66d409c343f04cfda647f9bfc7da6b2a与平面eqId38df751166484f09b6aeaf66df4e2d17所成角的正弦值.
更新:2019/10/21难度系数:0.65题型:解答题组卷:324次
为评估设备eqId2381423d4cd146cab95f55527681a766生产某种零件的性能,从设备eqId2381423d4cd146cab95f55527681a766生产零件的流水线上随机抽取100件零件作为样本,测量其直径后,整理得到下表:
直径eqIdd38ecf92ebf445b8ac470a65d58fcc7b
58
59
61
62
63
64
65
66
67
68
69
70
71
73
合计
件数
1
1
3
5
6
19
33
18
4
4
2
1
2
1
100
 
经计算,样本的平均值eqId480cb58a494f4c038585a85090282381,标准差eqIdb7586bb013fa4af48e33084f02439f2b,以频率值作为概率的估计值,用样本估计总体.
(1)将直径小于等于eqIdcb695aae103f467b804e555604cddfd8或直径大于eqIda2d4b439ba644eca8398c2dfe625c73c的零件认为是次品,从设备eqId2381423d4cd146cab95f55527681a766的生产流水线上随意抽取3个零件,计算其中次品个数eqId23268dd5f60243a1a7a07b55441c96a7的数学期望eqId35c76140bce949a5938f9630985c6238
(2)为评判一台设备的性能,从该设备加工的零件中任意抽取一件,记其直径为eqId86c70780eab347ccb2043d1d7bc9ed96,并根据以下不等式进行评判(eqIdd7be5abad1e34f6db17a56660de8d54f表示相应事件的概率):①eqId0df1245598af4e669f90e31158c2accf;②eqIdd283a454252948ffb80d3785ed3b20f9;③eqId43da28998eea4cfdb4b9b0983f7f7bbb.评判规则为:若同时满足上述三个不等式,则设备等级为甲;仅满足其中两个,则等级为乙;若仅满足其中一个,则等级为丙;若全部不满足,则等级为丁,试判断设备eqId2381423d4cd146cab95f55527681a766的性能等级并说明理由.
更新:2019/10/21难度系数:0.65题型:解答题组卷:79次
在平面直角坐标系eqId2272a344734c4fb088737b84294f7219中,直线eqId417e80f1349244878d01fe90e0891f5f的参数方程为eqIdf59ee196da7d412398683c8dae41a7c9eqId32454977564e4ee18da36bd51156c509为参数),以原点eqId2efda802d5534f6d92d9f8af7aaec28b为极点,eqId8e15963708e9415da25069fea5906e24轴的正半轴为极轴建立极坐标系,已知圆eqId19a4eb16029e4550a14f2afe4741a3c3经过极点,且其圆心的极坐标为eqId2508e665934f4dec858c6adb875e7c4f.
(1)求圆eqId19a4eb16029e4550a14f2afe4741a3c3的极坐标方程;
(2)若射线eqId869c70292e53424fb8310e3828e43922分别与圆eqId19a4eb16029e4550a14f2afe4741a3c3和直线eqId417e80f1349244878d01fe90e0891f5f交于点eqIdcc614bd3390c4d028df189b234dcc351eqId8754ce8cf7f34f04abb9a0c041f57f5c(点eqIdcc614bd3390c4d028df189b234dcc351异于坐标原点eqId2efda802d5534f6d92d9f8af7aaec28b),求线段eqId99a3187c2b8f4bcc9703c74c3b72f1f3的长.
更新:2019/10/21难度系数:0.85题型:解答题组卷:226次
已知函数eqId7bb84fbbb9784fc8b12ab1ce3039abe0.
(1)解不等式eqIdd6b786c53a2541cbbe512a2c7fa5e674
(2)若eqId4837c94ef0ff4dcf9b1dda4df363275a的最小值为eqId3a4208e0040c42ed8b09de2cae9d562e,正实数eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7满足eqIdec06a0c5969740f7a1f433c9073c1804,求eqIdb6a8e1de6fa4436ab3d43d3d5e3d6ec3的最小值.
更新:2019/10/21难度系数:0.85题型:解答题组卷:250次
中国古代十进制的算筹计数法,在世界数学史上是一个伟大的创造. 算筹实际上是一根根同样长短的小木棍,用算筹表示数1~9的方法如图:例如:163可表示为“figure”,27可表示为“figure”.现有6根算筹,用来表示不能被10整除的两位数,算筹必须用完,则这样的两位数的个数为_________.figure
更新:2019/10/21难度系数:0.85题型:填空题组卷:37次
已知定义在eqId7dcd2312d0bf4bb1befdfcc170e45791上的函数eqId4837c94ef0ff4dcf9b1dda4df363275a满足eqId0cbb5b9ded8c4ad8b4e6ca06b5d4648f,且当eqId85e8e6ec3634489f90cfc68aa041bae1时,eqIdff938433f0424672b8555f693efb42cb,则eqIdb51c6b8967f94df3aa558158668e2e34__________
更新:2019/10/21难度系数:0.85题型:填空题组卷:158次
关注官方微信